SIST EN ISO 7053:2019

Fasteners - Hexagon washer head tapping screws (ISO 7053:2019)

This document specifies the characteristics of hexagon washer head tapping screws, made of steel and stainless steel, with thread sizes ST2,2 to ST8, and with product grade A.

Sechskant-Blechschrauben mit Bund (ISO 7053:2019)

Dieses Dokument legt Eigenschaften für Sechskant-Blechschrauben mit Bund aus Stahl und nichtrostendem Stahl mit den Gewindegrößen ST2,2 bis ST8 und der Produktklasse A fest.

Fixations - Vis à tôle à tête hexagonale à embase plate (ISO 7053:2019)

Le présent document spécifie les caractéristiques des vis à tôle à tête hexagonale à embase plate, en acier et en acier inoxydable, de dimensions de filetage de ST2,2 à ST8, et de grade A.

Vezni elementi - Samorezni vijak s šestrobo glavo s podložko (ISO 7053:2019)

Ta dokument določa značilnosti vrtalnih vijakov s šestrobo glavo s podložko in samoreznim navojem
iz jekla, z velikostmi navojev od ST2,9 do ST6,3 in razredom izdelave A.

General Information

• Status: Published
• Public Enquiry End Date: 11-Jul-2018
• Publication Date: 18-Aug-2019
• ICS: 21.060.10 - Bolts, screws, studs
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 24-Jul-2019
• Due Date: 28-Sep-2019
• Completion Date: 19-Aug-2019
• Ref Project: EN ISO 7053:2019 - Fasteners - Hexagon washer head tapping screws (ISO 7053:2019)

Relations

• Replaces: SIST EN ISO 7053:2011 - Hexagon washer head tapping screws (ISO 7053:2011)
• Effective Date: 17-Jul-2019
• Revised: SIST EN ISO 7053:2011 - Hexagon washer head tapping screws (ISO 7053:2011)
• Effective Date: 26-Apr-2017

Overview

EN ISO 7053:2019 (Fasteners - Hexagon washer head tapping screws) specifies the characteristics of hexagon washer head tapping screws made of steel and stainless steel, covering thread sizes ST2,2 to ST8 and product grade A. The standard defines the required dimensions, end types, designation format and applicable acceptance inspection and finish options to ensure consistent production and reliable fastening performance.

Dimensions and symbols follow the drawings in Figures 1 and 2 and the dimensional values listed in Table 1. Common end types are:

• Type R - rounded end
• Type F - flat end
• Type C - cone end

Examples of standard designations provided in the document include:

• Hexagon tapping screw ISO 7053 – ST3,9 × 16 – St – R
• Hexagon tapping screw ISO 7053 – ST3,9 × 16 – A4-20H – C

Key Topics

• Scope & applicability: Thread sizes ST2,2 to ST8; material options limited to steel and stainless steel; product grade A requirements.
• Dimensions: Detailed dimensional tables and symbols (refer to ISO 225 for symbols and descriptions of dimensions).
• Materials & mechanical properties: References for steel and stainless steel mechanical classes and hardness (ISO 2702, ISO 3506-4).
• Threads & tolerances: Thread form and specification per ISO 1478 and tolerances per ISO 4759-1.
• Finishes & coatings: Electroplated and non-electrolytic zinc flake coatings per ISO 4042 and ISO 10683; stainless steel passivation methods referenced (ISO 16048).
• Acceptance: Inspection and acceptance criteria per ISO 3269.

Applications

EN ISO 7053:2019 is targeted at manufacturers, procurement specialists and design engineers specifying tapping screws for sheet-metal and light assembly applications where a hexagon washer head confers increased bearing area and installation torque control. Practical benefits include:

• Interchangeability: Ensures screws from different suppliers meet common dimensional and tolerance criteria.
• Quality control: Clear reference to acceptance inspection helps reduce warranty claims and rework.
• Material & finish guidance: Enables selection of stainless grades and coatings suited to corrosion resistance and service conditions.

Typical application areas: sheet-metal assembly, enclosure assembly, HVAC fittings, electrical enclosures and general mechanical fastening where self-tapping screws are required.

Related Standards

Relevant referenced standards cited by EN ISO 7053:2019 include:

• ISO 1478 - Tapping screws thread
• ISO 2702 - Heat-treated steel tapping screws - Mechanical properties
• ISO 3269 - Fasteners - Acceptance inspection
• ISO 3506-4 - Mechanical properties of corrosion-resistant stainless steel fasteners (tapping screws)
• ISO 4042 - Electroplated coating systems
• ISO 4759-1 - Tolerances for fasteners (product grades)
• ISO 8992 - Fasteners - General requirements
• ISO 10683 - Non-electrolytically applied zinc flake coating systems
• ISO 225 - Symbols and descriptions of dimensions
• ISO 16048 - Passivation of corrosion-resistant stainless-steel fasteners

For procurement and specification, reference EN ISO 7053:2019 to ensure conformity with European and international expectations for hexagon washer head tapping screws.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2019
Nadomešča:
SIST EN ISO 7053:2011
Vezni elementi - Samorezni vijak s šestrobo glavo s podložko (ISO 7053:2019)
Fasteners - Hexagon washer head tapping screws (ISO 7053:2019)
Sechskant-Blechschrauben mit Bund (ISO 7053:2019)
Fixations - Vis à tôle à tête hexagonale à embase plate (ISO 7053:2019)
Ta slovenski standard je istoveten z: EN ISO 7053:2019
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 7053
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 21.060.10 Supersedes EN ISO 7053:2011
English Version
Fasteners - Hexagon washer head tapping screws (ISO
7053:2019)
Fixations - Vis à tôle à tête hexagonale à embase plate Mechanische Verbindungselemente - Sechskant-
(ISO 7053:2019) Blechschrauben mit Bund (ISO 7053:2019)
This European Standard was approved by CEN on 2 June 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7053:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 7053:2019) has been prepared by Technical Committee ISO/TC 2 "Fasteners" in
collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2020, and conflicting national standards shall
be withdrawn at the latest by January 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 7053:2011.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 7053:2019 has been approved by CEN as EN ISO 7053:2019 without any modification.

INTERNATIONAL ISO
STANDARD 7053
Third edition
2019-06
Fasteners — Hexagon washer head
tapping screws
Fixations — Vis à tôle à tête hexagonale à embase plate
Reference number
ISO 7053:2019(E)
©
ISO 2019
ISO 7053:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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ii © ISO 2019 – All rights reserved

ISO 7053:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 1
5 Requirements and reference International Standards . 3
6 Designation . 4
Bibliography . 5
ISO 7053:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matter
...